Yeah. There was an arc where they had the cast split into two separate groups for much of a season and alternated episodes between them, but Ben Browder was the star and presumably had to be in every episode, so they did an episode that had Crichton being duplicated and then had one Crichton go with each group.

__________________Christopher L. Bennett Homepage -- Site update 11/16/14 including annotations for "The Caress of a Butterfly's Wing" and overview for DTI: The Collectors